US2793233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hormone intermediate and production thereof
Assignee: Research Corp
•
Filing: 1954-03-26
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Granted: 1957-05-21
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Expires: 1974-03-26
Abstract
No abstract record available.
Inventors
- 👤 Gilbert J Stork
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:52
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/74; C07C69/757
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
THE METHOD WHICH COMPRISES CONDENSING 1-HYDROXY4-B-HYDROXYETHYL-8-METHYLHYDRINDANONE-6-ESTERIFIED AT THE B-HYDROXYL WITH A MONOCYCLIC ARYL HYDROCARBON SULFPHONIC ACID WITH ACETOACETIC ESTER, HYDROLYZING THE CONDENSATION PRODUCT WITH AN AQUEOUS ALKALI AND RECOVERING THE 2,3,3A,7,8,9,9A.9B-OCTAHYDRO-3-HYDROXY-3A, 6-DIMETHYL-1BENZ(E) INDEN-5(4) -ONE THEREBY PRODUCED.
Claim 2
Independent Claim
36 words
THE METHOD WHICH COMPRISES CONDENSING 1-HYDROXY4-B-HYDROXYETHYL-8-METHYLHYDRINDANONE-6-ESTERIFIED AT THE B-HYDROXYL WITH A MONOCYCLIC ARYL HYDROCARBON SULFPHONIC ACID WITH ACETOACETIC ESTER, HYDROLYZING THE CONDENSATION PRODUCT WITH AN AQUEOUS ALKALI AND RECOVERING THE 2,3,3A,7,8,9,9A.9B-OCTAHYDRO-3-HYDROXY-3A, 6-DIMETHYL-1BENZ(E) INDEN-5(4) -ONE THEREBY PRODUCED.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-20 | 1960-11-19 | 1961-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-20 | 1964-11-19 | 1965-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-20 | 1968-11-19 | 1969-05-21 | $7700.00 | Window Closed / Lapsed |